Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem venceu os 350cc em Sachsenring?
 ###Tabelas: CREATE TABLE singles_finals_16_9-7 (singles_finals_16_9-7_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date INT, Championship VARCHAR, Surface VARCHAR, Opponent in the final VARCHAR, Score in the final VARCHAR) CREATE TABLE season_2_1997–98 (season_2_1997–98_id AUTO_INCREMENT PRIMARY KEY, Series # INT, Season # INT, Title VARCHAR, Directed by VARCHAR, Written by VARCHAR, Original air date VARCHAR) CREATE TABLE 2.ukrainians (2.ukrainians_id AUTO_INCREMENT PRIMARY KEY, C/W 15+ INT, Oblast\Age VARCHAR, 15 to 17 INT, 18 to 19 VARCHAR, 20 to 24 INT, 25 to 29 INT, 30 to 34 INT, 35 to 39 INT, 40 to 44 INT, 45 to 49 INT, 50 to 54 INT, 55 to 59 INT, 60 to 64 INT, 65 to 69 INT, 70+ INT) CREATE TABLE bi-_tl-_and_hg-based_high-__c__superconductors (bi-_tl-_and_hg-based_high-__c__superconductors_id AUTO_INCREMENT PRIMARY KEY, Formula VARCHAR, Notation VARCHAR, T c (K) INT, No. of Cu-O planes in unit cell INT, Crystal structure VARCHAR) CREATE TABLE by_year (by_year_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Designated Grand Prix VARCHAR, Track VARCHAR, 250 cc VARCHAR, 350 cc VARCHAR, 500 cc VARCHAR, Report VARCHAR)  
SELECT 350 cc FROM by_year WHERE Track = sachsenring